Safety attachment for drilling machines



March 26, 1935. E GORY SAFETY ATTACHMENT FOR DRILLING MACHINES Filed Feb. 2, 1954 3 Sheets-Sheet 1 tlorney March 26, 1935. E, GORY 1,995,422

SAFETY ATTACHMENT FOR DRILLING MACHINES Filed Feb. 2, 1954 3 She ets-Sheet 2 Inventor March 26, 1935. E. F. GORY SAFETY ATTACHMENT FOR DRILLING MACHINES Filed Fe 2, 1 s Sheets-Sheet s lnvenior Patented Mar. 26, 1935 SAFETY ATTACHMENT roe" DRILLING MACHINES:

-Ely Gory, Wilsonville, "Ill; I Application February I 2, 1934; swarm; 709,528

' 10 Claims; K015255 47) Thisinvention relates-to a safety attachment for drilling.machineslprefer'ablyof the coalvor rock drilling. type (the general object .of f the invention being to provide. a. telescopic cover for the threaded part ofv the drilling shaft or threadlbar of the machine which prevents clothing of a workman getting. caught in the threaded shaft, as often occurs, and which generally resultsin seri-' ousinjury'to the workman.

This invention also consists in. fcertain other features of constructionandin the combination and arrangement of the several parts, to be here-- inafter fully described, illustrated in the accompanying drawings and specifically. pointed out in the appended claims. i

In describing the invention in detail, reference will be had to the accompanying drawings whereinlike characters denote like or. corresponding parts throughout the several figures, and in Fig; 1' i s.a view of a drillingmachine, showing the invention'in use thereon; W

Fig..- 2 is a sectionaliviewshowing how the invention is supportedifrom the machine;

' Fig 3 is a view, partlyin-seotion, showinghow the telescopic sleeve membersengage each other thread bar; v

4 is a viewjof the extensible slotted tube or sleeve, partiallyinlsection; p

f Fig.5 is. a view ofone of. thecircular plates;-

Fig. 6 is asectional'viewthrough one of the plates;

andalso engage parts of the drilling shaft or Fig; fl'is a plan view of the drilling shaftor thread b'ar'of themachine, portions of the length thereof broken away; f i Y Fig;;8 is a'face view of ,theother plate;

I Fi'gsy9 and 10 are views showing-the rod memhers for connectinglthe twoplates together, and

Fig. 11 is an end view, of the hub member; Inthedrawings, the letter A indicates the drill ing .m'achin'e whichincludes the usual drill shaft or threadbar. a, the housingb which encloses the driving mechanism therefor, and the preferably separable boxorrnut-c which normally functions to feed saidshaft through said machine.

In carrying out. my invention I provide a plate lwh'ich is connected by bolts to the'housin'gJb and .a'second'plate 2 which is located inrear I of fthebox orlnutciand is connected .to the plate 1 ,by. rods- 3= aving,threaded reduced ends. engaging .threadedholesin said plates..-,Spacers 4 are provided for: one ofthe bolts,-; see Figs. 1; and 2.

Aihub 5 has itsqinner end {fitting in a countersink in the plate 2 and said hub is bOltGdtOl said pIateJZJ and islinternally screw threaded to receive the threaded end of a tube or sleeve 6 which is locked in the hub by a set screw 7. A second extensible tube or sleeve 8 has a sliding telescopic fit in the tube 6 and this tube 8 is formed with a longitudinally. extending slot 9 in the lengththereof for receiving theinnerend of a screw- 10; passing through a threaded hole in the outerend ofthe tube 6, see Fig. 3; The outer end of the tube 8has a reduced'bo-re which, at its junction with the large part of Y said bore of the tube 8," formsashoulder for engagement by a suitably fixedcollar. 11 provided at the outer end ofthe threaded portion ofthe drillingshaft or thread bard. I

, It-"will thus'be seen that the. tube 6 is firinly supported from the drillingmachine and slidably supports the telescoping tubeB, the'drilling shaft or thread bar a passing through-both tubes and as the drilling shaft or threadbare. is rotativelyfed outwardly, its collar 11,--engaging.or abutting the shoulder 'at the outer end of the tube 8,,will cause the tube 8 t'o-.move outwardly with the shaftand thus thethreaded'part of the shaft is ,coveredlbylthetelescopic tubes 6 and 8 ing of a workman getting caughtinf the threads of the shaft, which often' happens; and" which might injure or k'ill'"an attending' 'workmari, I, 7

While thedrawings show the tube'8'fprovide'd with an elongated'slotf9'ffor'receivingthe endiof the screw 10' which limits the outward movement of the tube 8," thisslot is notiabsolutely necessary as other suitable means may be provided for limit ing the outward 'movement of; theftub'e 8. When the invention is used on the 'typ ei'of machine, illustrated in Figs. 1 i and 2,1 the lower bolt 3"acts as I ablyi separable andthrea'ded' parts of the box or nut 0 through which is adapted to be fed the threaded shaft a-of the'machine; Inthis case, the bushings or spacers tare placedjat the inner ends of the lower'rod'3, as shownin Fig. 2,"and act to-hold the hinge members of thelbox or'nut c in properalignment on said rod; The'groove in the. plate 1,868 Figs, 2 and 5, permits "the threaded members of the box or not t z' t'ofopen only to the limit of such groove and keepsthenut orfbox c in proper alignment withf'th'edrilling v shaft a. I 1 It" will be' understood, however; that-other meansfor'attaching the invention to the -machine may be used and in accordance with the particular types' of "machines onwhich the in- 1 vention isused p mi In the several figures,- particularly, Figs-';='-=1; and 3, thesh'aftrads-illustrated in an advanced or extended; drilling position with the associated tubes o-r sleeves '6-an'd '8t=covering":and -p'r.otecting the: threaded portions of said shaft: 'In'Figit. 1 themsual. chuck or socket iSi shown attached to the forward end of the drilling shaft a to which is adapted to be fitted a suitablejdrilling tool, not shown.

It will be understood that the shaft a can be atall'ftimes andither'e is nofdanger 0 f 'thei'cl'oth-" 20) ment operations, it will be further understood. that the extensible tube or sleeve 8 iscaused to" travel with the return movement of the shafta by reason of the chuck or socket or other suitable element on the forward end of said shaft a abutting the forward end of the tube 8, thereby causing said tube to telescope in its backward movement in said tube 6. In other words, whether, the shaft a is extended or not, the threaded portions of said shaft a are at all times protected against contact by the clothing or body of an attending workman by the tubes or sleeves 6 and 8, thereby making the machine practically accident-proof to those who operate the machine or in close proximity to it.

It is thought from the foregoing description that'the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in theconstruction and in the combina tion and arrangement of the'several'parts, provided that such changes fall within the scope of the appended claims.

WhatI claim is:-

,1. In a drilling machine including a rotatable drill shaft adapted for forward and backward movement through said machine, a threaded por-' tion on said shaft, an extensible sleeve adapted Y for coaction'with said shaft in its movements through the machine and for "enclosing the threaded portion thereof insuch movements, and means for supporting said sleeve from a of the machine. 1

2. In a drilling machine'including its drill shaft provided with a threaded portion, a plate attached to a part of the machine, a second plate spaced from the first plate, the two plates receiving a feeding member for the shaft between them, means for connecting the two plates togetner; a hub carried by the second plate, a tube fitting in the hub, a second'tube telescoping into the first tube, the shaft passingthrough the two plates, the hub and the two tubes enclosing the threaded portion of'the shaft, and a collar at the outer end of the threaded part of the shaft for engaging apart of the second tube to cause movement of the second tube by the shaft.

.3. In adriling machine including a rotatable drill shaft having a threaded portion, means for imparting extending movement to said shaft, a stationary member enclosing a threaded portion of said shaft, means for supporting said member from said machine and an extensible member supported by said first member for enclosing an extended threaded portion of said shaft when said shaft is extended through said members.

4.In a drilling machine including a rotatable drill shaft having a threaded portion, means for extending said shaft through said machine, a stationary member enclosing a threaded portion of said'shaft, means for supporting said'member from saidmachine and a telescopic member slidably arranged within said first member-for enclosing an extended threaded potrion of said shaft when said shaft is extended through said machine.

5. In a drilling machine, in combination, a threaded drill shaft, driving mechanism for imparting rotation to said shaft, a feeding member arranged for threaded engagement with said shaft to rotatively advance said shaft through said ma-.- chine, a support, telescopic members carried by 1 said "support for enclosing the threads of said shaft, means on said shaft adapted to engage the'inner of said telescopic members upon advance movement of said shaft whereby said member is'extended with the advance movement of said shaft to enclose the extended threaded area of said shaft.

6. In a drilling machine, in combination, a

housing, a rotatable drill shaft adapted for movement through said housing, 7 a driving means for said shaft, a stationary sleeve associated with said housing adapted to receive said shaft, an extensible sleeve supported by said stationary sleeve adapted to receive, said shaftand be coactable therewith, and'means for extending said extensible "sleeve with said shaft upon movement thereof through said housing and said stationary sleeve. 9

Y 7. In a drilling machine, in combination, a housing, a rotatable drill shaft adapted for for ward and backward movement through said housing, a driving means for said shaft, a stationary sleeve associated with said housing adapted to re- 1 ceive'and enclose said shaft; an extensible sleeve supported by said stationary sleeve adapted to receive and enclose said shaftand arranged fortelescopic relation with said stationary sleeve, means for. extending said extensible sleeve upon forward movemnt of said shaft through said housing and said stationary sleeve, and means for restoring said extended sleeve in retracted telescoped relation with said stationaryfsleeve upon backward movement of said shaft through "said housing and said stationary sleeve. v I 1 8. A safety attachment for drilling machines comprising a support, a protecting sleeve fixedly secured to said supportand extended therefrom, an extensible protecting sleeveaxially disposed for telescopic relation with said first sleeve, and a rotatable drill shaft adapted upon forward movement through said support and saidfirst mentioned sleeve to impart a forward extensible movement to said extensible sleeve; I g

9. A safety attachment forfdrilling maohines comprising a support, a portectingsleeve fixedly secured to said support and extended, therefrom, an extensible protectingfsleeve axially disposed for telescopic relation with said first sleeve,"and a rotatable drill shaft adapted ,upon forward and backward movement through said support and said first mentioned sleeve toimpart like movement to said exten'siblesleev'e. 1' 10. A safety attachment for drilling machines comprising'a supp'orti a protecting sleeve fixedly secured to said support'and extended therefrom, an extensible protectingsleevefaxially disposed for telescopic relation with said first sleeve, a rotatable drill: shaft adapted for movement through said support and sleeves, and means on said shaft engageable with said extensible sleeve upon movement therethrough td'f impart ja'xial movement to said extensible" sleeve with s'aid shaft, r .1 e :1 i

r I ,lELY FnGORYp 

